Beginning of Essay
Cells, the make-up of all living things. Some cell are complete organisms, such as unicellular bacteria and protozoa. Other types of cells are called multicellular, such as nerve cells and muscle cells. Withen the cell is genetic material, Deoxyribonucleic Acid ....

Middle of Essay
.... and animal tissues. Along with Matthias Jakob Schleiden a German botanist, Schwann proposed the cell theory. The cell theory has three parts: 1. All organisms are composed of cells. 2. Cells are the basic units of structure and function in organisms 3. All cells come from preexisting cells. The impact on science was very great due to the discovery of cells and the cell theory. Many or all things were effected by the discovery of cells, everything was looked upon in a different way. Some people still did not believe that all living organisms were made of tiny microscopic chambers called cells. Many people thought that people that be ....